Examine source code of Jenny XJ-9

{
  "name": "Jenny XJ-9",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "jen.png"
    },
    "colors": {
      "frame": "rgba(240, 240, 240, 1)",
      "tab_background_text": "rgba(42, 140, 135, 1)",
      "toolbar": "rgba(24, 151, 171, 0.3)",
      "toolbar_field": "rgba(64, 199, 197, 0.62)",
      "toolbar_field_text": "rgba(42, 140, 135, 1)",
      "tab_line": "rgba(3, 146, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{087ddaaa-8374-4616-85d3-8608e3c8ed0b}"
    }
  }
}